Appendix C: Catholic and Protestant Admissions

Primary Catholic and Protestant testimony showing that Sunday observance rests on church authority, not on a command from Scripture.

The sharpest witness in the Sabbath controversy comes from the Roman Catholic Church itself. Catholic leaders have never hidden that the Sabbath was changed to Sunday by ecclesiastical decree centuries after the apostles. The excerpts below span newspapers, catechisms, devotional guides, and apologetic works. Together they form a direct admission that Sunday sacredness stands on tradition rather than on the Bible.

When I first encountered these admissions, I felt what you may feel now: a mixture of disbelief and unease. These were not obscure documents dug up by Protestant polemicists. They were statements from cardinals, catechisms, and official church publications, sources that Catholics themselves regard as authoritative. I read them with the same skepticism you might bring to this page. But the sources checked out. The admissions were real. What I did with that information took time to process. What you do with it is between you and God.

Two Perspectives

Before presenting the documentary evidence, consider how this material might be received.

From a Catholic’s Perspective

My faith doesn’t rest on whether every historical document was authentic. The Church has living authority, for Christ gave Peter the keys, and what the Church binds on earth is bound in heaven. Temporal errors don’t invalidate spiritual authority. The Donation of Constantine was unnecessary; the Church’s authority comes from apostolic succession, not from Constantine’s gift. When the Church apologizes for historical wrongs, that shows moral growth, not illegitimacy. Every institution makes mistakes. What matters is the unbroken chain from Peter to today’s pope.

As for the Sabbath: the Church has authority to interpret Scripture and establish liturgical practice. We worship on Sunday because the apostles began meeting on the Lord’s Day after the Resurrection. The specific day is a matter of discipline, not doctrine. The Fourth Commandment tells us to keep a day holy; the Church, guided by the Spirit, determined which day.

From a Sunday Church-Goer’s Perspective

I keep Sunday because that’s when Christians have gathered since the resurrection. Paul collected offerings on the first day of the week. John received his revelation on the Lord’s Day. The early church met on Sunday to celebrate the risen Christ. Whether the Catholic Church formally changed the day or recognized what Christians were already doing, the result is the same: we worship when the church has worshiped for two thousand years.

These Sabbath arguments feel like the legalism Paul warned against. He told the Colossians not to let anyone judge them regarding sabbath days. He told the Romans that one person esteems one day above another, while another esteems every day alike, and each should be fully convinced in their own mind. The specific day feels less important than the heart of worship. God looks at the heart, not the calendar.

What the Roman Catholic Church States Openly

• The seventh day remains the biblical Sabbath; the change to Sunday was the church’s act.
• Sunday-keeping is presented as a sign of Catholic authority over Scripture and tradition.
• Protestants who keep Sunday while claiming "Bible only" are challenged to return to the Fourth Commandment.

Representative Admissions

"The Catholic Church… by virtue of her divine mission, changed the day from Saturday to Sunday."

Catholic Mirror, "The Christian Sabbath," Sept. 2, 1893.¹ Catholic Mirror, "The Christian Sabbath," serialized Sept. 2–23, 1893; reprinted in The Christian Sabbath Explained.

"You may read the Bible from Genesis to Revelation, and you will not find a single line authorizing the sanctification of Sunday."

James Cardinal Gibbons, The Faith of Our Fathers (1917), 89.² James Cardinal Gibbons, The Faith of Our Fathers, 110th ed. (New York: P.J. Kenedy, 1917), 89.

"Of course the Catholic Church claims that the change was her act… And the act is a mark of her ecclesiastical power and authority in religious matters."

H. F. Thomas, chancellor for Cardinal Gibbons, letter dated Nov. 11, 1895.³ H. F. Thomas letter to a Protestant inquirer, Nov. 11, 1895; cited in The Catholic Extension Magazine, Aug. 1906, 213.

"The observance of Sunday by the Protestants is an homage they pay, in spite of themselves, to the authority of the Catholic Church."

Monsignor Louis Gaston de Ségur, Plain Talk About the Protestantism of Today (1868), 213.⁴ Monsignor Louis G. de Ségur, Plain Talk About the Protestantism of Today (Boston: Patrick Donahoe, 1868), 213.

"In observing Sunday, [Protestants] are accepting the authority of the spokesman for the Church, the pope."

Our Sunday Visitor, Feb. 5, 1950.⁵ Our Sunday Visitor, Feb. 5, 1950, p. 3.

"Sunday is our mark of authority.… The church is above the Bible, and this transference of sabbath observance is proof of that fact."

The Catholic Record, London, Ontario, Sept. 1, 1923.⁶ The Catholic Record, London, Ontario, Sept. 1, 1923.

"Had she not such power, she could not have done that in which all modern religionists agree with her—she could not have substituted the observance of Sunday, the first day of the week, for the observance of Saturday, the seventh day, a change for which there is no Scriptural authority."

Stephen Keenan, A Doctrinal Catechism (1876).⁷ Stephen Keenan, A Doctrinal Catechism, 3rd American ed. (New York: Edward Dunigan & Brother, 1876), 174.

These nineteenth and early twentieth-century sources might seem dated. But the claim persists. The Catechism of the Catholic Church (1992), the official doctrinal summary promulgated by Pope John Paul II, states:

"Sunday is expressly distinguished from the sabbath which it follows chronologically every week; for Christians its ceremonial observance replaces that of the sabbath."

Catechism of the Catholic Church, §2175 (1992)⁸ Catechism of the Catholic Church, 2nd ed. (Vatican City: Libreria Editrice Vaticana, 1997), §2175. Available at: https://www.vatican.va/archive/ENG0015/__P7N.HTM.

The word "replaces" is decisive. The Catholic Church does not claim Scripture changed the day. The Church claims it changed the day by its own authority. The nineteenth-century admissions were not rhetorical flourishes; they stated official doctrine that the modern catechism confirms.

The Forgery Pattern

The Sabbath admissions above are not the only area where the Roman Catholic Church has acknowledged claims built on questionable foundations. Consider the Donation of Constantine, which served for centuries as the papacy’s primary legal basis for temporal power.

The document purported to be a fourth-century decree from Emperor Constantine, granting Pope Sylvester I "all provinces, palaces and districts of the city of Rome and Italy and of the regions of the West" along with supreme spiritual authority over the entire church. For over a thousand years, popes cited this document to justify territorial claims, political interventions, and authority over kings.

In 1440, Lorenzo Valla (a Catholic priest and Renaissance humanist) published a devastating philological analysis proving the document was fabricated. The Latin contained medieval vocabulary that did not exist in Constantine’s era. The historical details contradicted fourth-century records. The Church’s response was to place Valla’s work on the Index of Prohibited Books, where it remained for centuries.⁹ Valla’s De falso credita et ementita Constantini donatione (1440) remained on the Index until its abolition in 1966.

Today, the Catholic Encyclopedia openly admits:

"This document is without doubt a forgery, fabricated somewhere between the years 750 and 850."

Catholic Encyclopedia, "Donation of Constantine"¹⁰ "Donation of Constantine," The Catholic Encyclopedia. Available at: https://www.newadvent.org/cathen/05118a.htm.

The document was used for over eleven hundred years before exposure and acknowledgment. The pattern is instructive: a foundational authority claim, centuries of enforcement, and eventual admission that the foundation was false. Yet the authority continues.

The Persecution Pattern

Daniel 7:25 prophesied that the little horn power would "wear out the saints of the most High." The historical record confirms this in the Church’s own archives.

In 1252, Pope Innocent IV issued the papal bull Ad Extirpanda, which authorized the use of torture against accused heretics. The bull specified torture should be applied "citra membri diminutionem et mortis periculum" (without permanent mutilation or risk of death), but this limitation proved largely theoretical in practice.¹¹ Piotr Sadowski, "Torture in Light of the Bull Ad extirpanda (1252) of Pope Innocent IV," Miscellanea Historico-Iuridica 22, no. 1 (2023): 435–454.

Ad Extirpanda remained the governing law of the Church for 564 years, from 1252 until Pope Pius VII suppressed the Inquisition in 1816. The Archdiocese of New York, in an official statement addressing this history, acknowledges:

"The most prominent approval was given by Pope Innocent IV in his Bull, Ad Extirpanda."

Archdiocese of New York, "A Challenging Lesson in Mercy"¹² Archdiocese of New York, "A Challenging Lesson in Mercy." Available at: https://archny.org/a-challenging-lesson-in-mercy/.

This was not a regional aberration but papal policy enforced across Europe for over five centuries. Those who held to the seventh-day Sabbath during this period (Waldenses in the Alps, Sabbatarian Anabaptists in Central Europe) faced the full weight of this apparatus.

The Apology Pattern

In 2000, Pope John Paul II led the Church in an unprecedented public confession. On March 12 (which he designated the "Day of Pardon"), the Pope presided over a liturgy at St. Peter’s Basilica in which the Church formally confessed sins in six categories:

1. Sins committed in the service of truth (the Inquisition, religious coercion)
2. Sins that have harmed the unity of the Body of Christ (divisions among Christians)
3. Sins against the people of Israel
4. Sins committed against love, peace, the rights of peoples, and respect for cultures and religions
5. Sins against the dignity of women and the unity of the human race
6. Sins in relation to fundamental rights of the person

The Vatican’s own record preserves this confession:¹³ Pope John Paul II, Homily for the Day of Pardon, March 12, 2000. Available at: https://www.vatican.va/content/john-paul-ii/en/homilies/2000/documents/hf_jp-ii_hom_20000312_pardon.html.

Five years earlier, in May 1995, Pope John Paul II made an even more direct statement while visiting the Czech Republic:

"Today, I the Pope of the Church of Rome, in the name of all Catholics, ask forgiveness for the wrongs inflicted on non-Catholics during the turbulent history of these peoples."

Pope John Paul II, Olomouc, Czech Republic, May 21, 1995¹⁴ "Pope calls for Christian unity," United Press International, May 21, 1995. Available at: https://www.upi.com/Archives/1995/05/21/Pope-calls-for-Christian-unity/7463801028800/.

These apologies constitute modern admissions of historical wrongdoing from the highest levels of the institution. They do not revoke papal infallibility claims; the Church distinguishes between doctrinal authority and sinful actions by Church members. But they establish a documented pattern: assertions of supreme authority, centuries of enforcement, and eventual acknowledgment that the methods were wrong. The authority claims remain.

Why These Admissions Matter

Return to the two perspectives we opened with. The Catholic reader might say: These historical errors don’t invalidate the Church’s spiritual authority. The Donation was unnecessary; our authority comes from apostolic succession. The Inquisition was wrong; we’ve apologized and grown. What matters is the unbroken chain from Peter.

The Sunday church-goer might say: Even if the Catholic Church formalized the change, Christians were already gathering on Sunday to celebrate the resurrection. The specific day is less important than the heart. Paul said not to let anyone judge you regarding sabbath days.

These responses deserve serious engagement.

To the Catholic perspective: The question is not whether individual errors invalidate spiritual authority. The question is whether the documented pattern aligns with what Scripture predicted. Daniel 7:25 prophesied that a power would arise that would "think to change times and laws" and "wear out the saints of the most High." The evidence presented in this appendix documents both elements: the claimed authority to change God’s Sabbath to Sunday, and 564 years of sanctioned measures against dissenters. I came to see this pattern as the prophecy finding its historical fulfillment. You may read the same evidence and reach a different conclusion.

To the Sunday church-goer: Paul’s words in Colossians 2:16 about "sabbath days" address the ceremonial sabbaths of the Levitical system, the annual festivals tied to the sanctuary services that pointed forward to Christ. These were shadows that found their substance in Christ (Colossians 2:17). The weekly Sabbath is different. It predates the ceremonial law by millennia, established at Creation (Genesis 2:2–3) and codified in the moral law written by God’s own finger (Exodus 20:8–11). Jesus kept it. The apostles kept it. And the Catholic Church openly admits it was changed not by Scripture but by ecclesiastical decree.

The Catholic Church concedes that Scripture never authorizes Sunday sacredness; the rationale is tradition backed by ecclesiastical power. The Fourth Commandment, by contrast, rests on God’s own voice and handwriting. The issue therefore becomes allegiance. Keeping the Sabbath affirms God’s authority and His sign of sanctification (Ezekiel 20:12, 20). Accepting Sunday because "the church changed it" affirms human authority above the Word. The Catholic admissions remove any pretense that both days rest on equal biblical footing.

This authority claim has deep historical roots. Pope Boniface VIII’s Unam Sanctam (1302) declared that "it is absolutely necessary for salvation that every human creature be subject to the Roman Pontiff."¹⁵ Boniface VIII, Unam Sanctam, Papal Bull, November 18, 1302. Available at: https://www.papalencyclicals.net/bon08/b8unam.htm. The bull claimed both spiritual and temporal swords belong to the Church, and that all earthly power must submit to papal authority. The nineteenth-century admissions above rest on seven centuries of consistent theological foundation.

Where This Leaves You

If you are a Catholic reader: Your love for Christ is not in question. Your devotion to the saints, your participation in the sacraments, and your reverence for Scripture: none of this is diminished by encountering difficult evidence. The question before you is not whether your faith is real. It is whether the day you observe as holy rests on Scripture’s authority or on institutional tradition that admits it changed what Scripture commanded. Francis of Assisi wrestled with hard truths about the church of his day. Teresa of Ávila reformed what needed reforming. Honest Catholics have always asked honest questions.

If you are a Protestant reader: The admissions above raise a different question for you. If the Catholic Church claims it changed the Sabbath, and you reject the Catholic Church’s authority, there is no reason to keep the Catholic Church’s day. Protestants declared Sola Scriptura (Scripture alone) as a founding principle. Yet the Fourth Commandment says "seventh day," and Protestant churches observe the first. The Catholic admissions remove the middle ground. Either Scripture authorizes Sunday (it does not, by the Catholic Church’s own admission), or tradition does. Every Protestant who keeps Sunday is, as Monsignor de Ségur wrote, paying "homage to the authority of the Catholic Church."

The Same Pattern: Marian Doctrine

The Sabbath change was not the Roman Catholic Church’s only exercise of claimed authority over Scripture. In 1854, Pope Pius IX declared the Immaculate Conception of Mary as binding dogma in the papal bull Ineffabilis Deus.¹⁶ Pope Pius IX, Ineffabilis Deus, December 8, 1854. Available at: https://www.newadvent.org/library/docs_pi09id.htm. The Catholic Encyclopedia, a secondary source reflecting Catholic scholarship, later acknowledged the doctrine lacks direct biblical proof:

"No direct or categorical and stringent proof of the dogma can be brought forward from Scripture."

Catholic Encyclopedia, "Immaculate Conception"¹⁷ Catholic Encyclopedia, "Immaculate Conception." Available at: https://www.newadvent.org/cathen/07674d.htm.

"It is therefore in divine tradition, the unwritten word of God, that we must seek the basic and unquestionable source of the dogma."

Catholic Culture, "Historical Development of the Dogma"¹⁸ Catholic Culture, "Historical Development of the Dogma of the Immaculate Conception." Available at: https://www.catholicculture.org/culture/library/view.cfm?recnum=9070.

Even the Catholic Church’s greatest theologian recognized the scriptural tension. In his Summa Theologica, Thomas Aquinas (the "Angelic Doctor" whose work remains foundational to Catholic philosophy) recorded this objection to Mary’s Immaculate Conception as part of his dialectical method:

"If the soul of the Blessed Virgin had never been stained with the contagion of original sin, this would have detracted from Christ’s dignity as the savior of all men."

Thomas Aquinas, Summa Theologica, Part III, Q. 27, Art. 2, Obj. 2.¹⁹ Thomas Aquinas, Summa Theologica, Third Part, Question 27, Article 2, Objection 2. Available at: https://www.newadvent.org/summa/4027.htm.

That Aquinas felt compelled to address this objection (he replied that Mary was sanctified after conception but before birth) shows the scriptural tension was real enough to require an answer. When the doctrine’s own advocates admitted they lacked direct scriptural proof, the 1854 definition becomes a clear exercise of claimed authority over Scripture. Sixteen years later, Vatican I (1870) formally defined papal infallibility, retroactively legitimizing such declarations. The pattern is consistent: tradition and papal authority override what Scripture alone supports. If the Roman Catholic Church can define Mary’s sinlessness as binding doctrine without scriptural proof, they can define Sunday sacredness the same way.

The Same Pattern: The Sacrifice of the Mass

The Council of Trent (1545–1563) codified Catholic doctrine in response to the Protestant Reformation. On September 17, 1562, the council formally defined the Mass as a propitiatory sacrifice in which Christ is offered anew:

"In this divine sacrifice which is celebrated in the mass, that same Christ is contained and immolated in an unbloody manner, who once offered Himself in a bloody manner on the altar of the cross… the holy Synod teaches, that this sacrifice is truly propitiatory."

Council of Trent, Session 22, Chapter 2²⁰ Council of Trent, Session 22, Chapter 2, "On the Sacrifice of the Mass" (September 17, 1562). Available at: https://history.hanover.edu/texts/trent/CT22MAS.html.

"The victim is one and the same, the same now offering by the ministry of priests, who then offered Himself on the cross, the manner alone of offering being different."

Council of Trent, Session 22, Chapter 2²¹ Council of Trent, Session 22, Chapter 2.

What Jesus gave was simple: bread, wine, and "do this in remembrance of me." What the medieval Mass became was something else. The priest alone knew the Latin words (Hoc est corpus meum, "This is my body") that supposedly transformed the elements. Ordinary believers no longer broke bread together; they watched the elevation of the host from a distance, believing that merely seeing it conferred grace. This resembles Hindu darshan, where merely seeing the deity is believed to confer blessing. The communal meal became a clerical mystery.

Despite this complexity, the Mass was central to medieval faith. Historians document that the elevation was the spiritual climax of the medieval week, and ordinary believers found profound meaning in the liturgical system they inherited.²² Eamon Duffy, The Stripping of the Altars: Traditional Religion in England 1400–1580 (New Haven: Yale University Press, 1992), argues that pre-Reformation Catholicism was vibrant and spiritually meaningful to ordinary people, whose devotion was genuine even if the system they trusted was unscriptural. Their devotion was sincere.

The Protestant Reformation challenged purgatory, indulgences, and papal supremacy, but reformers also stripped churches of altars and statues by force. Ordinary believers grieved what was taken. Forced iconoclasm (the destruction of religious images) does not convert hearts. My mother never touched the idols in my home shrine, though they grieved her. She interceded. Years later, I chose to throw them into a canal myself (see Chapter 1). Change comes from within.

The Reformers challenged the Catholic Church on everything except the calendar. Sunday worship survived intact. The Sabbath change predates the Reformation by over a thousand years, and it was the one thing Protestants refused to reform.²³ Constantine’s Sunday law (321 AD) and the Council of Laodicea’s anathema against Sabbath-keepers (364 AD) occurred more than a thousand years before Luther.

Sincerity does not override Scripture. The question is not whether they loved the Mass. They did. The question is whether Scripture teaches that Christ must be "immolated" anew in each celebration, or whether He was offered "once for all" and "there remaineth no more sacrifice for sin."

Scripture’s testimony is clear. The book of Hebrews emphasizes the finality and completeness of Christ’s sacrifice:

"By one offering he hath perfected for ever them that are sanctified."

Hebrews 10:14

"Now where remission of these is, there is no more offering for sin."

Hebrews 10:18

"Nor yet that he should offer himself often, as the high priest entereth into the holy place every year with blood of others; For then must he often have suffered since the foundation of the world: but now once in the end of the world hath he appeared to put away sin by the sacrifice of himself."

Hebrews 9:25–26

The Greek word ephapax (ἐφάπαξ), meaning "once for all," appears five times in Hebrews (7:27, 9:12, 9:26, 9:28, and 10:10) regarding Christ’s sacrifice. The word denotes an action completed definitively, never to be repeated.

The Protestant Reformers recognized the theological conflict. The Westminster Confession of Faith (1646) declared:

"In this sacrament Christ is not offered up to His Father, nor any real sacrifice made at all for remission of sins of the quick or dead… so that the popish sacrifice of the mass, as they call it, is most abominably injurious to Christ’s one only sacrifice, the alone propitiation for all the sins of the elect."

Westminster Confession of Faith, Chapter 29.2²⁴ Westminster Confession of Faith (1646), Chapter 29, "Of the Lord’s Supper." Available at: https://www.blueletterbible.org/study/ccc/westminster/Of_The_Lords_Supper.cfm.

The Heidelberg Catechism (1563), written the year after Trent’s Mass doctrine was defined, responded directly:

"The Mass teaches that Christ is bodily present in the form of bread and wine where Christ is therefore to be worshiped. Thus the Mass is basically nothing but a denial of the one sacrifice and suffering of Jesus Christ and a condemnable idolatry."

Heidelberg Catechism, Question 80²⁵ Heidelberg Catechism (1563), Question 80. This question was added after the Council of Trent’s definition. Available at: https://www.crcna.org/welcome/beliefs/confessions/heidelberg-catechism.

The pattern remains consistent. Just as the Roman Catholic Church claims authority to change the Sabbath without scriptural command, it claims authority to define the Mass as a propitiatory sacrifice despite Scripture declaring "no more offering for sin." In both cases, ecclesiastical tradition overrides the plain testimony of God’s Word.

Protestant Admissions: What the Reformers Knew

The Catholic admissions above are striking, but they are expected. The Roman Catholic Church claims authority over tradition and has never pretended that Sunday rests on Scripture alone. The Protestant admissions that follow are far more damaging to Sunday observance, because they come from men who staked their lives on Sola Scriptura, the principle that Scripture alone is the final authority.

The Protestant Reformers read Scripture in the original languages, debated Catholic theologians publicly, and risked their lives for biblical truth. They knew Saturday was the biblical Sabbath. They did not change it.

Martin Luther (1483–1546)

Luther, the father of the Protestant Reformation, admitted Sunday had no biblical command. In his Large Catechism, he acknowledged that the Fourth Commandment requires the seventh day:²⁶ Martin Luther, Large Catechism (1529), Fourth Commandment (Third in Lutheran numbering). Luther acknowledged: "Now, in the Old Testament, God separated the seventh day, and appointed it for rest." However, he argued this was ceremonial law binding only on Jews: "This, I say, is not so restricted to any time, as with the Jews, that it must be just on this or that day." Luther maintained Christians were free to keep any day as long as one day per week was observed for worship and rest. Available at Christian Classics Ethereal Library (CCEL) and Project Wittenberg. Luther’s position: the principle of rest was moral and perpetual, but the specific day (Saturday) was ceremonial and abolished. This became standard Protestant doctrine despite lacking biblical support.

"Now, in the Old Testament, God separated the seventh day, and appointed it for rest."

Martin Luther, Large Catechism (1529)

But Luther argued that Christians could keep any day, as long as one day per week was observed. This was rationalization. God did not say "one day in seven." He said "the seventh day." The irony compounds: Luther kept the Catholic Church’s numbering of the Ten Commandments (combining the first two, splitting the tenth), which buries the commandment against graven images. The Reformer who nailed 95 theses to Wittenberg’s door retained the very system designed to minimize what he claimed to champion.

John Calvin (1509–1564)

Calvin, the great systematic theologian, was even more direct. In his Institutes of the Christian Religion, he wrote:²⁷ John Calvin, Institutes of the Christian Religion (1559), Book 2, Chapter 8, Section 34 (2.8.34). Calvin explicitly stated: (1) Sunday is not the biblical Sabbath, (2) there is no divine command requiring Sunday observance, (3) the early church made this substitution based on expediency, not Scripture. Available via Gospel Coalition and public domain editions of the Institutes.

"The ancients did not substitute the Lord’s Day (as we call it) for the Sabbath without carefully discriminating between them… The Lord’s Day is not now kept on the ground of a rigid precept, as the Sabbath was by the Jews."

John Calvin, Institutes of the Christian Religion (1559), 2.8.34

Calvin admitted three things in a single passage. Sunday is not the Sabbath. There is no "rigid precept" (command) for Sunday. The early church made the substitution, not God. Despite this admission, Calvin kept Sunday while arguing the Sabbath commandment was abrogated at Christ’s resurrection. He never explained where Scripture grants any human institution authority to abolish one of the Ten Commandments.

John Wesley (1703–1791)

Wesley, founder of Methodism, wrote extensively about Christian perfection and holy living. On the Sabbath question, he followed Anglican tradition. In his Works, Wesley acknowledged that the Fourth Commandment commands the seventh day. He argued the commandment was "moral" (still binding) but that the "particular day" was not specified.²⁸ John Wesley, The Works of John Wesley, 3rd ed., 14 vols. (London: Wesleyan Methodist Book Room, 1872; repr. Grand Rapids: Baker, 2007). Wesley’s sermons on the law acknowledge the perpetuity of the moral law while treating the specific day as a matter of church tradition rather than divine command.

This is dishonest exegesis. Exodus 20:8–11 does not say "a day." It says "the seventh day." Specificity is the entire point. The commandment ties the seventh day to Creation itself: "For in six days the LORD made heaven and earth… and rested the seventh day: wherefore the LORD blessed the sabbath day, and hallowed it." The day is not interchangeable because the reason for the day is not interchangeable.

Isaac Williams (Anglican)

"And where are we told in the Scriptures that we are to keep the first day at all? We are commanded to keep the seventh; but we are nowhere commanded to keep the first day… The reason why we keep the first day of the week holy instead of the seventh is for the same reason that we observe many other things, not because the Bible, but because the church has enjoined it."

Isaac Williams, Plain Sermons on the Catechism, Vol. 1, 334–336²⁹ Isaac Williams (1802–1865), Plain Sermons on the Catechism, Vol. 1, 334–336. Williams was a fellow of Trinity College, Oxford, and a leader of the Oxford Movement (Tractarians). His admission is particularly significant because the Oxford Movement sought to recover Catholic elements within Anglicanism, making his candor about the lack of biblical authority for Sunday all the more telling.

Timothy Dwight (Congregationalist, President of Yale)

"The Sabbath was founded on a specific Divine command. We can plead no such command for the obligation to observe Sunday… There is not a single sentence in the New Testament to suggest that we incur any penalty by violating the supposed sanctity of Sunday."

Timothy Dwight, Theology Explained and Defended (1823), Sermon 107³⁰ Timothy Dwight IV (1752–1817), Theology Explained and Defended in a Series of Sermons (New Haven, 1818–1823), Sermon 107. Dwight served as president of Yale College from 1795 until his death. His grandfather was Jonathan Edwards, the most influential American theologian of the eighteenth century. Dwight’s admission carries the weight of Yale’s academic authority and the Puritan theological tradition.

What Modern Scholarship Confirms

The Reformers were not alone in their admissions. Modern Protestant scholars, with access to primary sources the Reformers lacked, have reached the same conclusions using rigorous historical methods.

Willy Rordorf, a Swiss Reformed professor of patristics at the University of Neuchâtel, spent years analyzing early Christian worship practices. His conclusion was unambiguous: early Christians gathered for Sunday worship, but they worked that day like everyone else in the Roman Empire. The concept of Sunday as a day of rest came from Constantine’s 321 AD legislation, not from apostolic teaching. In Rordorf’s words, Christian Sunday rest "would not have been possible in the early days of the Church until the Emperor Constantine."³¹ Willy Rordorf, Sunday: The History of the Day of Rest and Worship in the Earliest Centuries of the Christian Church, trans. A.A.K. Graham (Philadelphia: Westminster Press, 1968), 154. Rordorf (b. 1933) was ordained in the Swiss Reformed Church in 1958 and served as professor of early church history at the University of Neuchâtel from 1964–1993. His work remains a standard academic reference on the origins of Sunday observance. Available at: https://archive.org/details/sundayhistoryofd0000rord.

C.W. Dugmore, the British scholar who founded the Ecclesiastical History Society and edited the Journal of Ecclesiastical History from 1950–1979, reached a complementary conclusion. He found remarkably little evidence in the New Testament and sub-apostolic literature that Sunday was considered the most important day of the Christian week. The Sabbath, Dugmore concluded, "did not disappear as a day of Christian worship until the late fourth or early fifth century."³² C.W. Dugmore, The Influence of the Synagogue upon the Divine Office (London: Oxford University Press, 1944), 33. Dugmore’s chapter "Lord’s Day and Easter" in the Oscar Cullmann Festschrift, Neotestamentica et Patristica (Leiden: Brill, 1962), 272–281, makes the complementary observation that evidence for early Sunday observance is sparse. Dugmore (1909–1990) held the chair of ecclesiastical history at King’s College London and founded the Ecclesiastical History Society in 1961.

The historical evidence reveals a transitional period during which Christians kept both days: the Sabbath for rest and worship, the Lord’s Day for celebrating the resurrection. The fourth-century Apostolic Constitutions instructed believers explicitly: "Keep the Sabbath, and the Lord’s day festival; because the former is the memorial of the creation, and the latter of the resurrection."³³ Apostolic Constitutions VII.23.3 (c. 375 AD). This anonymous church manual compiled earlier sources and reflects widespread practice. The fifth-century church historian Socrates Scholasticus confirmed this pattern: "Although almost all churches throughout the world celebrate the sacred mysteries on the sabbath of every week, yet the Christians of Alexandria and at Rome, on account of some ancient tradition, have ceased to do this" (Ecclesiastical History V.22). The Council of Laodicea (364 AD) later forbade Saturday rest, calling it "Judaizing," but the very prohibition proves the practice was common enough to require official suppression. When the Council of Laodicea (364 AD) anathematized Christians for "resting on the Sabbath," it was not preventing innovation but suppressing established practice. The churches at Rome and Alexandria had abandoned Saturday observance early; the rest of Christendom held on longer.

Why They Did Not Change Back

The Reformers did not change back. By the 1500s, Sunday had been enforced for over twelve hundred years. Challenging it would have isolated them from other Protestants, divided their own movements, and cost political support from Sunday-keeping rulers. They chose their battles and kept the Catholic Church’s Sunday.

The Catholic Church noticed the inconsistency. Cardinal James Gibbons wrote in The Faith of Our Fathers: "You may read the Bible from Genesis to Revelation, and you will not find a single line authorizing the sanctification of Sunday. The Scriptures enforce the religious observance of Saturday, a day which we never sanctify." Protestant Reformers who championed Sola Scriptura kept the one practice that most plainly contradicts it. The Catholic admissions in this appendix are candid, but they are expected. These Protestant admissions are devastating, because the men who made them claimed to follow Scripture alone.